TFA struck me as strawman hand-wringing. As pointed out by other comments, "PC" is already a loaded term, defined by an individual's tolerance. The one person quoted,

"It seems like everyday you wake up something has changed … Do you say Jew? Or Jewish? Is it a black guy? African-American? … You are on your toes because you never know what to say."

seems to worry more than I do. I don't keep tabs on this ever-changing carousel of ethnic labels, but I do know what not to say, and that seems to have kept me out of trouble. Jew? Jewish? C'mon, is it really that common that a Jew is getting bent out of shape because you didn't use "Jewish"? Perhaps a vocal/powerful minority will hold the feet of other vocal/powerful people to the fire, but it's not like their minions infiltrate the common man. My Jewish neighborhood doesn't appear to care enough to say anything.

I've often wondered if those complaining aren't really saying, "Black? African-American? I'm always confused on which term to use when denigrating another ethnic group. For instance, in the following sentence, 'Blacks are always the ones...'." Maybe if you're polite, no one cares as long as you at least tried to use one or the other.